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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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  <script>
    // 数字类型
    const x = 100; // Number
    const y = 100n; // BigInt

    // boolean
    const bx = true; // 真 1
    const by = false; // 假 0


    
  </script>
</body>

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